4331440 has 40 divisors (see below), whose sum is σ = 10423440. Its totient is φ = 1671936.

The previous prime is 4331417. The next prime is 4331441. The reversal of 4331440 is 441334.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×4331440² = 37522744947200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4331441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387 + ... + 3253.

It is an arithmetic number, because the mean of its divisors is an integer number (260586).

Almost surely, 2^4331440 is an apocalyptic number.

4331440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4331440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5211720).

4331440 is an abundant number, since it is smaller than the sum of its proper divisors (6092000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4331440 is a wasteful number, since it uses less digits than its factorization.

4331440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 4331440 is about 2081.2111858243. The cubic root of 4331440 is about 163.0086938793.

Adding to 4331440 its reverse (441334), we get a palindrome (4772774).

The spelling of 4331440 in words is "four million, three hundred thirty-one thousand, four hundred forty".